Gaya APA

Fitzpatrick, F, L., Swanson, C, P. (NULL). Our plant resources plants and their economics importance . New: New York: Holt, Rinehart and Winston; 1964.

Gaya MLA

Fitzpatrick, Frederick, L., Swanson, Carl, P.. "Our plant resources plants and their economics importance". New: New York: Holt, Rinehart and Winston; 1964, NULL. Text.